[KSP2] A failure occurred while executing com.google.devtools.ksp.gradle.KspAAWorkerAction

[GuilhE]

In this and this KMP projects, when I turn on KSP2 it will fail kspKotlinIosSimulatorArm64 with:

e: [ksp] java.lang.NullPointerException: null cannot be cast to non-null type org.jetbrains.kotlin.load.java.structure.impl.JavaClassImpl

* What went wrong:
Execution failed for task 'shared:kspKotlinIosSimulatorArm64'.
> A failure occurred while executing com.google.devtools.ksp.gradle.KspAAWorkerAction
   > null cannot be cast to non-null type org.jetbrains.kotlin.load.java.structure.impl.JavaClassImpl

using:

kotlin = "2.0.0"
ksp = "2.0.0-1.0.21"
ksp.useKSP2=true

possible duplicate of #1929

[GuilhE]

Still failing:

kotlin = "2.0.20-Beta1"
ksp = "2.0.20-Beta1-1.0.22"
ksp.useKSP2=true

[ting-yuan]

Duplication of #1753

[GuilhE]

Still failing:

kotlin = "2.0.20"
ksp = "2.0.20-1.0.24"
ksp.useKSP2=true

[GuilhE]

@ting-yuan 1.0.25 release notes states that this is fixed but I'm still getting:

* What went wrong:
Execution failed for task ':shared:kspKotlinIosSimulatorArm64'.
> A failure occurred while executing com.google.devtools.ksp.gradle.KspAAWorkerAction
   > null cannot be cast to non-null type org.jetbrains.kotlin.load.java.structure.impl.JavaClassImpl

Use this to reproduce.

[Nirav186]

kotlin = "2.0.20-RC"
room = "2.7.0-alpha01"
ksp = "2.0.20-RC-1.0.24"

and add ksp.useKSP2=true to your gradle.properties (if you are using kotlin 2.x.x)
this will fix your problem and if you still getting the same error then try to remove @TypeConverters(<converter class name>::class)

[GuilhE]

kotlin = "2.0.20-RC"
room = "2.7.0-alpha01"
ksp = "2.0.20-RC-1.0.24"

and add ksp.useKSP2=true to your gradle.properties (if you are using kotlin 2.x.x) this will fix your problem and if you still getting the same error then try to remove @TypeConverters(<converter class name>::class)

check this